Projectile flier

ABSTRACT

A projectile flier has a flying body, a propeller device mounted on the flying body and an actuator detachably combined to the flying body to rotate the propeller device. The flying body has a tube located at its gravity center to rotatably combine with an axis of the propeller device. The actuator has a handle with a pulling device that efficiently drives the axis of the propeller device to rotate. Until the propeller device rotates at high speed to provide efficient floating force, the flying body disengages from the actuator and flies into sky. By efficiently rotating the propeller device with the pulling device, rotation speed of the propeller device is significantly increased to make the flying body fly over a long period and a far distance.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a projectile flier, and moreparticularly to a projectile filer that is easy for operation andsuitable for kids.

2. Description of Related Art

A conventional flier toy, so-called “bamboo dragonfly” in China, issimply composed of a strip and a rod attached to a center of the strip.Two ends of the strip each have a slope surface to perform a propellerblade. By having such simple structure, the flier toy can be operatedwith hands by rubbing at the rod and quickly releasing the flier.Inertia force keeps the flier rotating to create floating force at thepropeller blades to make the flier enable to fly into the sky. However,the flier can not fly long and far because simply rubbing with handsdoes not provide enough inertia force to the flier to achieve a longjourney.

SUMMARY OF THE INVENTION

A main objective of the present invention is to provide a projectileflier that can fly long and far.

Another main objective of the present invention is to provide aprojectile flier that can be operated in an effort-saving way.

To achieve the foregoing objectives, the projectile flier comprises:

a flying body having a tube mounted at a gravity center of the flyingbody;

a propeller device rotatably mounted on the flying body and having anaxis penetrating the tube of the flying body; and

an actuator detachably engaged with the axis on the flying body anddriving propeller device to rotate, the actuator having:

a handle;

a chamber defined in the handle; and

a reeling assembly received inside the chamber to operationally drivethe propeller device.

By efficiently rotating the propeller device with the pulling device,rotation speed of the propeller device is significantly increased tomake the flying body fly over a long period and a far distance.

Further benefits and advantages of the present invention will becomeapparent after a careful reading of the detailed description withappropriate reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of a preferred embodiment of a projectileflier in accordance with the present invention;

FIG. 2 is a perspective view of another preferred embodiment of theprojectile filer in accordance with the present invention;

FIG. 3 is cross-sectional side view of a joint of a flying body and apropeller wheel in the projectile flier; and

FIG. 4 is a cross-sectional side view of an actuator of the projectileflier in FIG. 2.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

A projectile flier in accordance with the present invention comprises aflying body, a propeller device mounted on the flying body and anactuator detachably combined to the flying body. The flying body has atube located at its gravity center to rotatably combine with an axis ofthe propeller device. The actuator comprises a handle with a pullingdevice that efficiently drives the axis of the propeller device torotate. Until the propeller device rotates at high speed to provideefficient floating force, the flying body disengages from the actuatorand flies into sky. By efficiently rotating the propeller device withthe pulling device, rotation speed of the propeller device issignificantly increased to make the flying body fly over a long periodand a far distance.

With reference to FIGS. 1 and 2, two preferred embodiments of theprojectile fliers respectively have two types of actuators 30 a, 30 b indifferent shapes, one is substantially tubular and the other issubstantially handle-shaped. Each embodiment of the projectile flyercomprises a flying body 10, a propeller device 20 and one of theactuator 30 a, 30 b, wherein the flying body 10 is helicopter-shaped topresent a mini model of helicopter and catch a kid's interest. Design ofthe flying body 10 and the propeller device 20 in size is based on theformula: Sv=Kv×S×b/Lv to define relationship of a tail 12 of the flyingbody 10 and the propeller device 20. Wherein, Sv is the side area oftail 12, Kv is the coeffient for this formula, S is the area of thepropeller device, b is the diameter of the propeller device and Lv isthe distance from center of the propeller device to the wind pressurecenter on the tail (efficient moment arm).

As shown in FIG. 3, a joint of the flying body 10 and the propellerdevice 20 is shown. The flying body 10 has a tube 13 with an axial hole14 secured at its top. The axial hole 14 is provided to rotatably engagewith an axis 22 of the propeller device 20. Particularly, the tube 13has to be located at a gravity center of the flying body 10 to keep theflying body 10 stable during flying. Moreover, the flying body 10 isselectively added with some weighting elements (not shown) therein toadjust the gravity center exactly.

The propeller device 20 is a propeller wheel comprises the axis 22,multiple blades 23 and a rim 21. The multiple blades 23 are radiallyconnected to the axis 22. Each blade 23 is a strip inclined about 3 to 7degrees from the axis 22 to the rim 21 upwardly. The axis 22 extendsdownward and has a middle portion, a lower portion, a neck 24 defined atthe middle portion and a fastener 15 attached at the neck 24 to keep thepropeller device 20 from detaching from the tube 13 of the flying body10. The lower portion of the axis 22 further has an engaging portion 25in form of cylinder to detachably engage the actuator 30 a, 30 b.

As shown in FIG. 4, the actuator 30 b in FIG. 2 is shown in across-section side view. The actuator 30 b comprises a handle 302, achamber 304 formed on the handle 302, a holding portion 35 rotatablymounted on the chamber 304, a reeling assembly received inside thechamber 304, and an optional rewinding device accommodated inside thehandle 302. The holding portion 35 has a recess detachably and snuglycombined with the engaging portion 25 of the propeller device 20. Thereeling assembly comprises a reel 31 rotatably received inside thechamber 304, a string 32 winding on the reel 31 and pulling tag 33attached to a free end of the string 32. The reel 31 has one endcombined with the holding portion 35 and another end attached to therewinding device within the handle 302. The rewinding device is simply arubber band 34 resiliently connected between the reel 31 and a bottom ofthe handle 302 to keep the string 32 winding on the reel 31.

When the projectile flier is assembled, the axis 22 of the propellerdevice 20 penetrates the tube 13 of the flying body 10 and engages thefastener 15, i.e. an O-ring, at the neck 24 to keep the propeller device20 secured on the flying body 10. When the projectile flier is operated,the engaging portion 25 of the axis 22 is inserted into the recess ofthe holding portion 35 on the actuator 30 to temporarily mount on theactuator 30. The string 32 is pulled outward by holding the pulling tag33 to drive the reel 31 to rotate and then to rotate the propellerdevice 20 simultaneously. When the propeller device 20 creates enoughfloating force, the propeller device 20 with the flying body 10disengages from the actuator 30 b. Because the string 32 can be pulledquickly to rotate the propeller device 20 at high speed and withmultiple circulations, inertia force of the propeller device 20 isstrong to make the flying body 10 fly longer and further thanconventional one created by hand operation. Meanwhile, the rubber band34 is twisted when the string 32 is pulled out so that the rubber band34 provides a restitution force to the reeling assembly to rewind thestring 32 on the reel 31 after releasing the pulling tag 33. Therefore,operation of the projectile flier is effort-saving and convenient.

Although this invention has been described in its preferred form with acertain degree of particularity, it is understood that the presentinvention of the preferred form has been made only by way of example andthat numerous changes in the details of construction and the combinationand arrangement of parts any be resorted to without departing from thespirit and scope of the invention.

1. A projectile filer comprising: a flying body having a tube mounted ata gravity center of the flying body; a propeller device rotatablymounted on the flying body and having an axis penetrating the tube ofthe flying body; and an actuator detachably engaged with the axis on theflying body and driving propeller device to rotate, the actuator having:a handle; a chamber defined in the handle; and a reeling assemblyreceived inside the chamber to operationally drive the propeller device.2. The projectile flier as claimed in claim 1, wherein the reelingassembly comprises: a rewinding device received inside the handle; aholding portion rotatably mounted on the chamber and having a recessdetachably engaged the axis of the propeller device; a reel having oneend combining the holding portion and another end combining therewinding device; a string winding on the reel to operationally drivethe reel to rotate; and a pulling tag attached to a free end of thestring.
 3. The projectile flier as claimed in claim 2, wherein therewinding device is a rubber band connected between the reel and abottom of the handle to provide a restitution force to the reelingassembly.
 4. The projectile flier as claimed in claim 1, wherein thepropeller device comprises the axis, multiple blades radially attachedto the axis and a rim connected to distal ends of the blades to performa propeller wheel.
 5. The projectile flier as claimed in claim 1,wherein the flying body is helicopter-shaped.
 6. The projectile flier asclaimed in claim 1, wherein the axis of the propeller device further hasa middle portion, a neck defined at the middle portion and a fastenermounted at the neck to avoid the propeller device disengaging from theflying body.